One of my high school math students’ most used math reference sheets is this free printable factors chart for the numbers from 1 to 100. I give my algebra and pre-calculus students a copy of this 1-100 factors chart at the beginning of the school year, and we end up referencing them a lot. This …

# Prime and Composite Numbers

Print a copy of this prime number chart printable (PDF) which features a visual representation of the prime numbers from 1 to 100. I originally created this prime numbers chart for my pre-calculus students to use as a reference while simplifying radicals. My students used this chart as a quick way to tell if a …

I created this factors race activity to give my math concepts students practice listing all of the factors of a number. I shared it on twitter in January 2018, and it’s only now making it to my blog in January 2020. Better late than never, right?!? To prep for the activity, I printed 4 sheets …

This prime factorization foldable is one of my Algebra 1 students’ most-used resources throughout our radicals unit. I was inspired to create this foldable after one of my eighth graders commented that it would be cool to have something in our notes that gave us every single prime factorization. I took this idea and ran …

I created this prime factorization graphic organizer for my Algebra 1 students to summarize two different methods for finding prime factorization: the factor tree method and the birthday cake method. I teach my Algebra 1 students to simplify radicals through prime factorization because it works no matter what the index of the radical is. This …

Yesterday, I shared about all the amazing things I learned/experienced as part of the Tulsa Math Teachers’ Circle Summer Immersion Workshop. As part of that post, I mentioned that I had created some factor tree puzzles after being inspired by the puzzles shared by Dr. Harold Reiter and the puzzle created by one of the …

When my husband (formerly an Australian maths teacher) and I were dating, he wrote a blog post where he shared how he used the Sieve of Eratosthenes with students. I was blown away by this post because I’d used this activity with students before but never exactly like the way he explained. Shaun didn’t just …

I created these prime numbers below 100 charts for my Algebra 1 students to glue in their interactive notebooks. To help my students remember their prime numbers, I created a quarter sheet with each of the prime numbers below 100 for my students to glue in their notebooks. I have a few students repeating Algebra …

I gave my students a prime factorization practice booklet which gave them a chance to try out both methods we learned for prime factorization – the factor tree method and the birthday cake method. After giving students a bit of time to work each problem, a student volunteer came to the SMARTBoard to present a …

Today I’m sharing a free prime numbers poster to download. I have so many ideas of how I would teach things/do things if life was ideal. And, by ideal, I mean I could pause time occasionally and get 100% caught up with my to do list. I’m pretty sure I have no idea what …

I created the prime and composite numbers chart to glue in our Algebra 2 interactive notebooks at the beginning of our unit on radicals. Before we could delve into simplifying radicals, I needed to refresh my students’ memories regarding prime and composite numbers. We color-coded a hundreds chart to keep in our notebooks for reference. …

Today I want to share with you a new method I learned for teaching prime factorization called the birthday cake method. Before I became a teacher, I sometimes battled fears that teaching could be boring. After all, once you’ve mastered high school math, there’s not much new to learn. Well, there might not be any new …